2008 Workhorse R20 problems, complaints & recalls
Most-reported problem areas: Service Brakes, Hydraulic (1)
Safety recalls (1)
Engine And Engine Cooling 2010-07-06 · campaign 10V314000 · 39 vehicles
Defect: NAVISTAR IS RECALLING CERTAIN MODEL YEAR 2008 WORKHORSE R20 CHASSIS MANUFACTURED FROM FEBRUARY 5, 2007 THROUGH SEPTEMBER 24, 2008, EQUIPPED WITH CATERPILLAR C7 ENGINES. THE #5 AND #6 FUEL LINES MAY CRACK AT THE FASTENING POINT TO THE COMMON FUEL RAIL AND CAUSE A FUEL LEAK.
Risk: A FUEL LEAK, IN THE PRESENCE OF AN IGNITION SOURCE, CAN RESULT IN A VEHICLE FIRE.
Fix: CATERPILLER WILL NOTIFY OWNERS AND REPAIR THE VEHICLES FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 9, 2010. OWNERS MAY CONTACT CATERPILLAR TOLL-FREE AT 1-800-447-4986 OR NAVISTAR AT 1-260-461-1890.
Service bulletins (18)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-02-05 · IK2600090 · Other
new carb idle reduction change request
Electrical System 2026-02-03 · IK4300035 · Service Bulletin/Repair Instructions
this tool is designed to compare diamond logic feature data across multiple vehicle configuration files. it allows users to quickly load files either manually or directly from the diamond logic builder vehicles folder using vin-based selection. as files are added or removed, the comparison runs auto
Engine 2026-01-19 · IK2600256 · Service Bulletin/Repair Instructions
this article is intended to provide information for how to program international engines that have been sold to another company and installed in a chassis that does not have an international vin number. this may include detroit series 40 engines, perkins, street sweepers, cranes, fire trucks, genera
Engine 2026-01-02 · IK2600047 · Service Bulletin/Repair Instructions
engine replacements for all international engines will need to follow this procedure.
Structure:body 2025-12-19 · IK1600272 · Service Bulletin/Repair Instructions
this document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and windshields using an ultrasonic sound detector.
Power Train 2025-12-05 · IK0600030 · Service Bulletin/Repair Instructions
this document will guide the user through understanding prop shaft codes and understanding the variations of prop codes. (metric prop codes start with the number a 4 and non metric prop codes start with a 2.)
Showing the 6 most recent of 18 bulletins. Search all of them free at nhtsa.gov.
What owners report
2010-10-11 · Service Brakes, Hydraulic · 16,500 mi“driving to workhorse service center (jim price chevy truck center, charlottesville va) for a different matter the dash warning lights started blinking for brakes, abs, atc and parking brake. service center hooked up computer and determined that the meritor/wabco hydraulic compact unit (hcu) which is the major part of the hydraulic power brake (hpb…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.